What would be a good way for me to break into the business and start working as a private investigator? I know I need to get a license from my state, but what should I do beyond that and what can I ...

yes if this is what was agreed upon prior to hiring. But, if she has not agreed to this prior to being hired, her boss cannot do this. And your daughter cannot lose her job if she only does the 40 hour week.

Legally, workers must have at least ONE day off per week, unless you are a self-employed worker, in that case you work the days you please.
She couldn't have agreed to work every day in her contract, if she has, the contract is violating the law and her boss is under perfect conditions to be punished to the full extent of the law.
Your sister must fight for her rights as an employee.

I would LOVE for people to put the state and/or country where they are from when they blog here. NO. If you are in the U.S. you cannot be forced to work 7 days straight unless you have a day off the preceding week. The only person who had it partially right was "just a gurl and Absinthe." I have seen poster "Judy" blog a dozen times. Would love to know what she does, but certainly should not be blogging on legal. A few here really know there stuff. Mitch.. Catlaw.. and a few others.. but Judy really needs to get the heck out of the law & legal area....

Forced, no, she can quit. But can she be scheduled that way legally, yes she can, and if she isn't willing to work the hours she is scheduled for she can and likely will be fired. The only law is that if she works over 40 hours in a week, or in a few states works over 8 hours in a day, she must be paid overtime for it.

legally i don't know, however the answer is wrong, she can loose her job unless she has a contract of employment. If she has no contract, and I doubt she does in gas station, she can be terminated without cause for any reason. This is called being an at-will employee. However, if she is terminated without good cause she will be able to collect unemployment insurance benefits.

As I scanned through these answers many are wrong. Yes, it is legal to make some one work seven days a week. Many of the service industries do this and a gas station falls into that. Employees in many fields work every other weekend. Where I work we used to work for 13 days straight and have one satuday off- then we would work 14 days straight and have one week end off. I know there used to be a law that you had to have one sunday a month off. I had ajob one time where I worked 12 hour shifts every weekend. The one day I was told I had to take off one sunday a month and make that up during the wee.

depends on the state in which you live. i don't think there is any laws governing days off, as long as she is paid overtime for hours in excess of 40 per week (unless she is an exempt employee, which she probably isn't if she works in a gas station). go to the department of labor website and do some research.

I imagine it depends on the state in which you live. Assuming she is not a minor and does not have a contract that forbids that particular schedule, it could very well be legal. For example, I'm from New York and I know that the way the law is written, one day off must be given each calendar week. However, that could result in someone being scheduled to work up to 12 days in a row. This could happen if the employee has off on Sunday and works Monday, Tuesday, Wednesday, Thursday, Friday, Saturday one week, then the next week works Sunday, Monday, Tuesday, Wednesday, Thursday, and Friday, then has off Saturday. There are also nuances for the type of work done, the number of employees, etc. Try checking the Department of Labor website for your state.